Razor blade sharpener



June 21, 1932. q HOLTZMAN 1,864,065

RAZOR BLADE SHARPENE R Filed Aug. 27, 1925 INVENTOR .J %771/ML Patented June 21, 1932 UNITED STATES JOHN HOL'IZMAN, OF NEW YORK, N. Y.

RAZOR BLADE SHABPIENER Application filed August 27, 1925. Serial No. 52,722.

movement exemplified with a razor blade sharpening machine; Fig. 2' shows a section of- Fig. 1 on the line 2, 2; Fig. 3indicates a section of Fig. l on the line 3, 3; Fig. 4 is an elevation of some details; Fig. 5- represents a top planview of Fig. 4; Fig. 6 shows an elevation and axial section of some detailsand Fig. 7 shows a section of Fig. 1 on the line 7,7. g j

A U shaped frame isformed with: the pair the connecting member 22. A top cross shaft in thisinstance is indicated with the members 25 and 26, which are hinged to each other, for the purpose of clamping between them -the razor blade 28. The'razor blade 28 is indicated with two'cutting edges having respectively the sides A, B and A and B. A flattened projection 30 extends from one of the members of said top crossshaft' andbe end 31. The latter is supportedin an opening in the member 20. The other end of "the said top cross shaft has fastened'thereto the 40 tripping arm having the members 32 and 33, with the edges D and E and the member 32'is shown with the edges D and E.

An intermediate cross shaft 40 isindicated below the said top cross :shaft. The shaft40 has formed therewith the journal end 41, the shank 42 with the flattenedportion=43 and the-second journal end 44. On thejournal end'41 is fastened the cam sector 47, the segmental gear 48 and the spur gear 49. The

of members 20 and 21, jointed at one end, by

yond said projection is formed the journal and the pinion 37. The member 33'is showntwolatter are-integral with each'other and are loosely supported on the journal end 41 The pinion 50 is fastened to the shank 42 of the shaft 40. A spiral stropping member 53 heart shaped in cross section, to form the tripping shoulders 54 is fastened to the shaft 40'. The member 53' has formed therewith the heart shaped ends 55 with the tripping shoulders 56, which latter are in line with the tripping shoulders 54.

A bottom drivingv shaft has fastened to one end thereof the spur gear 61, which is of the same pitch diameter and meshes with the spur gear 49. The end of the shaft 60 adjacent to the spur gear 61 is journaled in an opening in tlie'member 21.

At the other end of the bottom shaft 60 are fastened the" segmental gear 63" with the teeth 64, and. the segmental gear 65 Wlllh the teetlr 66. The teeth of both said segmental gears 63 and 65 are of the same pitch dilb ameter' and form a continuous circumferential row' of teeth, with their respective teeth on the different segments, laterally spaced from each other, and their ends are connected by the gap68' formed witlrboth: segmental gearsand their respective portions are laterally spaced from each other. An operating handle 68ais "fastened tooneend of the shaft 603 An intermediate pinion 69'is j ournaled' to themember20;

A springisindicated withthe members 70 and 71' joined by thelspiral portion 72. A screw 73 rigidly connects said spiralportion to the member 20 of the frame of the movement. Theend' 70 is-disposed to seat on the flattened'projection 30'ofthe top cross shaft", and the end71' is disposedto seat' on the flattened portion 43 of the intermediate cross shaft' 40.

To operate the movement the user revolves 3 the operating. handle 1 68a inthe direction of the arrow-X only; Whereby the shaft 60 and' tl1esegmental=gears63 and 65 are turned in the samesdirection. The teeth 66 of-the segmental= gear 65 meslrwith' the teeth of the spur gear 69,;and the latter is turned a comlete revolution'withone half ofarevolution of-the shaft 60, by means of'which the stroppingv member 53 is turnedone revolution in the samedirectionof rotation with the-shaft pinion 50.

60. The elements may be considered located as shown in the drawing, that is to say the razor blade 28 is located in a flexed position with the side A of one of its cutting edges bearing against the circumferential surface of the stropping member 53. At the same time the edge E of the arm 33 of thetripping member bears against the circumferential surface of the cam sector 47. Next the operating handle 68a is turned for a portion of a revolution and the razor blade-'28, is re leased from the stropping member 53, the latter rotating in the direction of the arrow Y and the blade is located in a vertical-position clear of the tripping shoulders 54 of the said stropping member 53 and yielding: ly maintained in said position, by virtue of the end70 of the spring bearing up against the flat face of the flattened projection 30 of the top cross shaft having the members 25 and 26. The tripping arm with the members 32 and 33 assume a horizontal position. At the same time the teeth 64 of the segmental gear 63 are in mesh with the teeth of the Upon further turning of the shaft 60 by means of the operating handle 680;, the teeth of the segmental gear 48 mesh with the teeth of the pinion 37 and the blade 28 begins to reverse and upon further rotation of the shaft 60 the blade 28 is turned onehalf of a rotation and located in a reverse vertical position, and atthe same time the tripping arm having the members 32 and 33 has made a one half rotation and is again located in a horizontal position. At this time the gap 68 of the segmental gears 63 and 65 is located opposite the teeth of the pinions 50 and 69. Upon further rotation of the shaft the teeth 66 of the se mental gear mesh with the teeth of the pinion 69 and the stropping member 53 turns in a direction opposite to the arrow Y.

In this position of the elements the mem ber 71 of the spring bears upon the flat end portion 43 of the intermediate cross shaft 40 to maintain the stropping member 53 in locked position. Upon further rotation of the shaft 60 one of the shoulders 54 of the stropping member 53 bears against the side A of one of the cutting edges of the razor blade 28. Upon further rotation of the shaft 60 the blade 28 is tilted to an inclination opposite to that shown in Fig. 3, and the edge D of the arm 32 of the tripping member bears against the circumferential surface of the cam sector 47. Upon further rotation, the side A of one edge of the razor blade is sharpened by the circumferential surface of the stropping member 53, until one of the shoulders 54 clears the razor blade 28. Upon further rotation of the shaft 60 the teeth 64 ofthe segmental gear 63 mesh with the pinion 50 and the rotation of the member 53 is reversed to the direction indicated by the arrow Y, and the side B of one of the edges of the razor blade is sharpened.- Upon further rotation of the shaft 60 the razor blade again resumes a vertical position when it clears from one of the tripping shoulders 54 of the stropping member. Upon further rotation of the shaft 60 the teeth of the segmental gear 48 mesh with the teeth of the pinion 37 and the blade-is again-turned a one half revolution, and the gap 68 is again opposite the pinions 50 and 69, with the end 71 of the spring again bearing upon the flattened portion, 43. Upon further rotation of the shaft 60, the teeth 66 of the segmental gear 65. mesh with teeth of the pinion 69 and the rotation of the stropping member is reversed to a direction opposite the arrow Y and the side B of the razor blade 28 is sharpened and the edge E of the member 32 of the tripping arm is riding on the cam sector 47.

Upon further rotation of the shaft 60 the razor blade 28 again assumes a vertical position and the members 32 and 33 of the tripping arm assumes a horizontal position. Upon further rotation of the shaft 60 in the same direction, the rotation of the stropping member 53 is reversed to the direction of the arrow Y, and the side A of the razor blade is again sharpened which completes a cycle for .95

sharpening both sides of each edge of the razor blade 28. The purpose of the coaction of the end 71 of the spring with the flattened;

portion 43 of the shaft 40 is to lock the spiral stropping member 53 in position, preventing accidental rotation of said, member 53.

7 Various modifications may be made in the invention and the present exemplification is to be taken as illustrative and not limitative thereof.

Having described my invention what I desire to secure by Letters Patent and: claim is:

1. A mechanical combination including a rotatable sharpening element, a rotatableelement carrying a blade, an arm extending from said blade carrying element, a drive shaft, means actuated by said drive shaft to engage said arm to keepv the blade in tension against said sharpening element, a gear on said shaft, a second gear in constant mesh with said first gear, a third gear for-reversing said blade carrying element, a tension spring arresting said third gear, means on said second gear to actuate said third gear against the tension of said spring for each complete revolution of said second gear, and said spring being adapted to retain said third gear in a predetermined operative position on its pivot for proper engagement thereof by said actuating means.

2. A razor blade stropping machine having a rotatable sharpening roll, said roll having a mutilated region, a drive shaft, mechanism operated by said shaft to alternately rotate said roll in opposite directions while said shaft is driven in one direction, a pivoted blade holder, said mechanism rotating said blade holder to bring the blade in registration with said mutilated region, and spring means simultaneously actuating said roll and blade holder at the moment of said registration of the blade and mutilated region to facilitate the efliciency of this registration.

3. In a stropping machine for razor blades, the combination of a frame, a sharpening element rotatably mounted in said frame, a pivotally mounted blade holder, spring tension means for maintaining said sharpening element in predetermined position relatively to said holder and resisting the free rotation of said element, and manually actuated mechanism mounted in said frame to dispose the edge-sides of the blade to said sharpening element individually and successively.

In testimony whereof I .afiix my signature.

JOHN HOLTZMAN. 

